Panorama of a huge Chinstrap Penguin rookery at the colony of Chinstrap Penguins, Pygoscelis antarcticus, at Cape Lookout on Elephant Island, South Shetland Islands, Antarctica. They require solid, snow-free ground for nesting. On land they build circular nests from stones, and lay two eggs, which are incubated by both the male and the female for shifts of 6 days. The chicks hatch after about 37 days, and have fluffy gray backs and white fronts. The chicks stay in the nest for 20–30 days before they go to join a creche. At around 50–60 days old, they moult, gaining their adult feathers and go to sea. The pink background of the rookery is guano which is pink due to their diet being mainly krill. Original image over 11,000 pixels long.